import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		
		final int ones = N % 2 == 0 ? N / 2 : (N - 1) / 2 - 1;
		
		if(N % 2 != 0){
			System.out.print("7");
		}
		
		for(int i = 0; i < ones; i++){
			System.out.print("1");
		}
		System.out.println();
		
	}
	
}